Water heater



@atented Eec. 25%, 192$.

PATENT OFFICE.

LESLIE E. PETERS, SAN FRANCISCO, CALIFORNIA, ASSZGNGR TO NEW WAY MANU-FACTURING COMPANY, 01 SAN FRANCISCO, CALIFORNIA, A CORPORATION OFCALIFORNIA.

warns HEATER.

Application filed March 1925. erial No. 17,562.

This invention relates to water heaters of the type adapted toautomatically control, within itself, the amount of gas to be deliveredthereto.

An object of this invention is to provide a water heater constructed insuch a manner as to automatically control the amount of gas required forsatisfactorily heating the water therein. v

Another object of this invention is b0 provide a water heater in whichthe pilot light is utilized for maintaining the heat in water in athermostat control reservoir forming part of the heater.

Another object of the present invention is to provide a combined waterheater and thermostat control reservoir, having asso ciated therewith ameans adapted to proportionately regulate the amount of fuel to be usedto the amount of heated water drawn therefrom. Y

Another object of this invention is to provide a water heater soconstructed as to deliver the most efficiency for the least cost ofoperation.

With these and other objects which will present themselves hereinafter,my invention consists of certain novel features of constructiondescribed in detail herein and particularly set forth in the appendedclaims, ref ence being had to the accompanying drawings forming a partof this application, in which F 1 is a sectional view of my water heatershowing in detail the various parts thereof and the manner in which theyare assembled, and 4 2 is a top view of the water heater.

Referring to the drawings, the numeral 1 represents a cylindrical casingcomprised of two metal cylinders between which and on the inside surfaceof the innermost of the said metal cylinders are asbestos layers adaptedto retain the heat within the casing. The cylindrical casing 1 isprovided with a top 2 having th rein an opening 3, and a bottom 4;.Above the top 2, is an inlet pipe 5, connected. to thermostat controlreservoir 6, which extends into the casing 1 and secured to and projectsthrough the top 2. The coil 7 encircles the reservoir 6 and is connectedat one end *ith the said reservoir. while the other end. is providedwith an steel or other suitable material, is located inside and projectsabove the upper end of a copper tube 10, the latter tube being securelyheld at its said upper end within a boss 2 located on the top 2 ofcasing l. The lower end of the copper tube 10 is open and it, togetherwith the thermo rod 9 therein, extends into the reservoir 6 through thetop part thereof.

The valve 11 is connected, by means of an upright rod 12 which passesthrough a protecting tube 13, to one end of a lifting bar 14, the saidbar 14 being pivoted at its other end on bar 15. A lever 16 is pivotedon upright bar 17 which is secured to and sup ported by boss 2 and is sopositioned that the projecting end of thermo rod 9 may press upwardlyagainst the said lever, thereby affording a means when the thermo rodmoves in an upward direction, for causing the valve 11 to becomeunseated from its seat 18.

The copper tube has a relatively high coefficient of expansion, and thethermo rod 9 has a relatively low coefficient of expansion, so by theapplication of cold to the heated tube 10, the latter contracts and thethermo rod 9 is forced in an upward direction. As water is withdrawnfrom outlet 8 the supply in reservoir 6 is replenished by water comingin through the top of the reservoir through inlet pipe 5. Thecomparatively cool water, coming into the reservoir through inlet pipe5, and passing downwardly therein around the copper tube 10,

causes the said tube to become cooled, thereby causing it to contractand force the thermo rod in an upward d1rect1on. The thermo rod 9 uponmovmg in an upward direction forces lever 16 against lifting bar 14,thereby causing the valve 11 to become unseated, which action allows gasto flow to the inside of the casing, as will be hereinafter explained.

if water ceases to be withdrawn from retervoir 6, the-supply enteringinlet pipe 5 is stopped and the tube 10, together with thermo rod 9become heated, as hereinafter explained, thereby allowing the saidthermo rod to move downwardly within the said tube and cause the valve11 to close. The gas supplying the fuel for heating the coils andreservoir, enters through pipe 19, which outlet 8. A thermo rod 9, madefrom cold is connected to valve chamber 20, and thereafter 3&32168through lead 21 to burner 22, where it ignites and furnishes sufficientheat for the device. Connected to valve chamber and projecting throughthe bottom t into casing 1 is a pilot burner 23, which when lit,constantly heats the pipe 24: leading from the bottom of reservoir 6through a hole in the casing to the outside thereof. The pipe 24 servesas a means for draining the reservoir as well as a means for keeping thewater therein in a warm state, because of the heat being constantlyapplied thereto by pilot humor 23. The lead 21 is provided with a valve25 whichpermits the shutting off of the gas going to the burner 22. Thereservoir 6 not only serves as a means for retaining water heatedthrough pilot burner 23, but also as a means for causing thethermostatic means operating the valve 11 to function, for bysupplanting the warm water ordinarily located within the top of thereservoir with cool water entering through inlet pipe 5, the tube 10contracts and causes the thermo rod to move in an upward direction,thereby providing means for allowing sufficient gas to enter burner 22.

Though I have shown and described a water heater of particularconstruction, I do not wish to be limited to the exact form shown, butdesire to include within the limits of my invention any arrangement ofparts substantially as set forth in the appended claims.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. A water heater comprising an enclosed casing provided at its bottomwith a burner, a reservoir located inside the casing having a waterinlet pipe connected to the top thereof, a coil connected to andencircling the reservoir, a thermostatic control means extending intothe reservoir through the top thereof, which said thermostatic controlmeans is operated by water entering the reservoir through the inletpipe, means located on the top of the casing and connected to a valvefor admitting fuel to the burner located at the bottom of the casing,which said means is operated to open and close the valve by thethermostatic control means, and a pilot burner located under the saidreservoir, whereby the water in the said reservoir may be maintained ina heated state.

2. A water heater comprising, an enclosed casing provided at its bottomwith a burner, a reservoir located inside the casing and provided. witha water inlet pipe at its top,

a coil connected to and encircling the reservoir, a thermostatic controlmeans extending into the reservoir through the top thereof and actuatedby water entering through the inlet pipe, means for admitting fuel tothe burner, means connected to the top of the casing and operated by thethermostatic control means, for regulating the amount of fuel enteringthe burner, and a pilot burner adapted to maintain the water in thereser voir in a heated condition.

3. A water heater comprising an enclosed ca.-ing provided with a burnerat its bottom, means for admitting gas to the burner, a valve locatedwithin the means, a reservoir located inside the casing, a coilconnected to and encircling thereservoir, means attached to the casingand valve whereby the valve may be operated to regulate the flow of gasto the burner, a thermostatic control means located in the reservoir foractuating the means for operating the valve, a water inlet pipe foradmitting water to the reservoir whereby the thermostatic control meansis actuated, and a pilot burner for maintaining the water in thereservoir in a heated condition.

A water heater comprising an enclosed casing provided at its bottom witha burner, means for regulating the flow of gas to the burner, areservoir located inside the casing and provided therein with athermostatic control means for ac ting the means for regulating the flowor gas to the burner, a water inlet pipe connected to the reservoiradjacent the thermostatic control means, whereby the water entering thereservoir causes the thermostatic control means to operate, meansconnected to the reservoir for withdrawing the water therefrom andseparate means for maintaining the water in the reservoir in a heatedstate.

5. A water heater comprising a casing having a burner located at thebottom thereof, means for delivering fuel to the burner, a reservoirlocated inside the casing and provided with means for admitting waterthereto, a coil connected to and encircling the reservoir, athermostaticcontrol means located inside the reservoir adapted to be actuated by theflow of water into the reservoir, means connected to the casing andoperated by the thermostatic control means whereby the amount of fueldelivered to the burner may be automatically regulated, and means forboth igniting the fuel delivered to the burner and for n'iaintaining thewater in the reservoir in a heated condition.

LESLIE E. PETERS.

